Transient multi-FICKian hygro-mechanical analysis of wood

被引：45

作者：

Konopka, Daniel ^{[1
]}

Kaliske, Michael ^{[1
]}

机构：

[1] Tech Univ Dresden, Inst Struct Anal, D-01062 Dresden, Germany

来源：

COMPUTERS & STRUCTURES | 2018年 / 197卷

关键词：

Wood mechanics; Multi-FICKian moisture transport; Hygro-mechanical coupling; Orthotropic elasticity; Multi-surface plasticity; MOISTURE; SIMULATION; DIFFUSION; FAILURE; MODELS; WATER;

D O I：

10.1016/j.compstruc.2017.11.012

中图分类号：

TP39 [计算机的应用];

学科分类号：

081203 ; 0835 ;

摘要：

A new hygro-mechanically coupled material model to simulate the structural behaviour of wooden objects below the fibre saturation area is introduced. A multi-FicKian moisture transport model is coupled to a moisture-dependent, orthotropic, elasto-plastic, mechanical material model. It is applied to wooden specimens at simulated climate changes of the ambient air and analysed by the finite element method with respect to internal stresses due to swelling and shrinkage. A simulation of the ductile failure of a swelling pressure experiment is presented. The results are compared to different, widely used moisture transport models. The importance of capturing water vapour diffusion inside the object and its emissivity at the objects' surface are discussed. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：12 / 27

页数：16

共 53 条

[1]

[Anonymous], 1998, Computational Inelasticity. Interdisciplinary applied mathematics

[2]

AVRAMIDIS S, 1987, WOOD SCI TECHNOL, V21, P249

[3] EVALUATION OF 3-VARIABLE MODELS FOR THE PREDICTION OF EQUILIBRIUM MOISTURE-CONTENT IN WOOD [J].

AVRAMIDIS, S .

WOOD SCIENCE AND TECHNOLOGY, 1989, 23 (03) :251-257

[4] Moisture-dependent elastic characteristics of walnut and cherry wood by means of mechanical and ultrasonic test incorporating three different ultrasound data evaluation techniques [J].

Bachtiar, Erik V. ;

Sanabria, Sergio J. ;

Mittig, Johannes P. ;

Niemz, Peter .

WOOD SCIENCE AND TECHNOLOGY, 2017, 51 (01) :47-67

[5]

Bader T., 2011, THESIS

[6] The poroelastic role of water in cell walls of the hierarchical composite "softwood" [J].

Bader, Thomas K. ;

Hofstetter, Karin ;

Hellmich, Christian ;

Eberhardsteiner, Josef .

ACTA MECHANICA, 2011, 217 (1-2) :75-100

[7]

Belytschko T, 1999, INT J NUMER METH ENG, V45, P601, DOI 10.1002/(SICI)1097-0207(19990620)45:5<601::AID-NME598>3.0.CO

[8]

2-S

[9]

Crank J., 1975, The Mathematics of Diffusion, V2nd

[10]

Eberhardsteiner J., 2002, MECH VERHALTEN FICHT

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